Abbe Number Calculator

Posted by Dinesh on

Use this simple abbe number (V-number or constringence) calculator to measure of the material's dispersion, with high values of V indicating low dispersion in optics and lens design.

standard wavelengths at which n is commonly determined, including the standard subscripts employed
? in nmFraunhofer's symbolLight sourceColor
365.01iHgUV
404.66hHgviolet
435.84gHgblue
479.99F'Cdblue
486.13FHblue
546.07eHggreen
587.56dHeyellow
589.3DNayellow
643.85C'Cdred
656.27CHred
706.52rHered
768.2A'KIR
852.11sCsIR
1013.98tHgIR

Abbe Number (V-number) Calculation

Formula:

VD = (nD - 1) / (nF - nC)

where,
nD, nF and nC - the refractive indices of the material at the wavelengths of the Fraunhofer spectral lines of D-, F- and C respectively.
VD - abbe number of material